I hear you. My teen is a junior in high school. I managed my first two cruises last year and was thinking I was going to get to travel some. Then I became my dad's guardian and primary caregiver. He has dementia and has other illnesses too. I've already changed the booking on a cruise I had planned for this May until November of 2012. I say, if you get the chance to travel, then you should.
You know, Mexico is really hot, so maybe you could think about being there in like say, November.